FreeCAD Path Threadmilling for CNC: How to make it work

I have an updated video on this topic using FreeCAD's built Super Secret built in Threadmilling feature. Some of this still applies such as using separate files for swapping tools.    • FreeCAD Super Secret Threadmilling CAM Pat...   In my learning about CNC machining, I have chosen FreeCAD as my primary CAD & CAM tool. I wanted to do Threadmilling on my Desktop CNC machine, but could not find much info online about it in FreeCAD. So I got to work figuring it out. FreeCAD has not fully implemented this as a feature. There are some FreeCAD issues and quirks, but you can work around that and this video shows you how. FreeCAD version 20.1 and 21.1 0:00 - Intro 1:51 - FreeCAD Test Model 2:38 - Thread Measurements 6:00 - FreeCAD Threadmill bit model 7:30 - CAM Tap hole 8:46 - CAM Thread helix 9:28 - Thread cut calculations 10:58 - Threadmilling issue in FreeCAD 12:00 - Threadmilling fix in FreeCAD 14:28 - Finish Threadmill pass 16:30 - Simulation 17:46 - Tool change solution 22:34 - Test #1 24:26 - Fix GCODE issue 25:40 - Test #2, file #1 26:09 - Change tool and run file #2 26:52 - Success!